Patent US4408235A successfully refreshed from Google Patents.
US4408235A
Expired / Lapsed
US
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Recording mode locking system in a video signal magnetic recording apparatus
Assignee: Victor Company of Japan Ltd
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Filing: 1981-06-03
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Granted: 1983-10-04
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Expires: 2001-06-03
Abstract
Abstract In a video signal magnetic recording apparatus having a loading mechanism for loading a magnetic tape which is placed at a predetermined position unto a predetermined tape path and unloading a magnetic tape which is in a loaded state, a power source switch for supplying or interrupting the supply of power by closing or opening, and a mechanism for enabling the loading mechanism to perform an unloading operation when the power source switch is closed, a recording mode locking system comprises a locking switch circuit which is closed for locking the recording mode, and a recording mode signal producing circuit for producing a recording mode signal upon closing of the power source switch in a state where the locking switch circuit is in a closed state. The loading mechanism is supplied with the recording mode signal when the power source switch is opened and then closed afterwards during a loading state, to remain in the loading state.
Inventors
- 👤 Yukio Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:59
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/026; G11B15/60; G11B15/66; G11B15/665; G11B15/6653; G11B15/6656
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
150 words
A recording mode locking system in a video signal magnetic recording apparatus having loading means operating between loaded and unloaded states, a magnetic tape which is loaded from a predetermined position into a predetermined tape path and which is unloaded from the loaded state, a power source swith which closes or opens for supplying or interrupting a source power to the apparatus, and means for enabling said loading means to perform an unloading operation when said power source switch is closed, said recording mode locking system comprising: locking switch means which is activated for locking the recording mode; and recording mode signal producing means for producing a recording mode signal upon the closing of said power source switch where said locking switch means is in an activated state and said tape is in a loaded state, said loading means remaining in said loaded state responding to the recording mode signal.
Claim 2
Dependent Claim
150 words
A recording mode locking system in a video signal magnetic recording apparatus having loading means operating between loaded and unloaded states, a magnetic tape which is loaded from a predetermined position into a predetermined tape path and which is unloaded from the loaded state, a power source swith which closes or opens for supplying or interrupting a source power to the apparatus, and means for enabling said loading means to perform an unloading operation when said power source switch is closed, said recording mode locking system comprising: locking switch means which is activated for locking the recording mode; and recording mode signal producing means for producing a recording mode signal upon the closing of said power source switch where said locking switch means is in an activated state and said tape is in a loaded state, said loading means remaining in said loaded state responding to the recording mode signal.
Claim 3
Dependent Claim
121 words
A recording mode locking system as claimed in claim 1 which further comprises a signal forming circuit for forming an output signal having a predetermined waveform responsive to a closing of said power source switch, and AND or NAND means for performing an AND or NAND operation responsive to the output signal of said signal forming circuit and to the activated state of said locking switch, means for supplying an output of said AND or NAND means to said recording mode signal producing means, and means for producing said recording mode signal in response to a signal produced by said AND or NAND means according to the activated state of said locking switch and the closing of said power source switch.
Claim 4
Dependent Claim
61 words
A recording mode locking system as claimed in claim 2 in which said signal forming circuit forms an output signal having a predetermined sustaining time responsive to a closure of said power source switch, and said recording mode signal producing means produces a recording mode signal for said predetermined sustaining time responsive to the signal formed by said signal forming circuit.
Claim 5
Dependent Claim
20 words
A recording mode locking system as claimed in claim 3 in which said predetermined sustaining time is substantially two seconds.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |